GETTING READY
1) Wash the mushrooms and soak in the warm water for 20 minutes.
2) Cut the fish in narrow slices.
MAKING
3) Drain the mushrooms, reserving the water. Slice the mushrooms.
4) In a saucepan, bring the dashi or the broth, clam juice and the mushroom water to a boil.
5) Add the fish and mushrooms and simmer for 8 minutes.